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Emerging Contaminants in Natural and Engineered Water Environments: Environmental Behavior,...
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Emerging Contaminants in Natural and Engineered Water Environments: Environmental Behavior, Ecological Effects and Control Strategies

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 1636

Special Issue Editors

Dr. Fanhao Song

E-Mail Website
Guest Editor
Chinese Research Academy of Environmental Sciences, Beijing, China
Interests: dissolved organic matter; black carbon; biomass pyrolysis; environmental pollutants; water quality
Special Issues, Collections and Topics in MDPI journals
Dr. Xiaodong Li

E-Mail Website
Guest Editor
Chinese Research Academy of Environmental Sciences, Beijing, China
Interests: environmental behaviour; environmental remediation of soil and groundwater; advanced oxidation processes; free-radical processes in environment
Dr. Qiuheng Zhu

E-Mail Website
Guest Editor
Center for Eco-Environment Research, Nanjing Hydraulic Research Institute, Nanjing, China
Interests: emerging contaminants; environmental behaviour; ecotoxicology; ecological engineering; environmental remediation; environmental microorganisms; risk assessment

Special Issue Information

Dear Colleagues,

Pollution of water environments is becoming an increasingly serious issue, especially considering the emergence of new pollutants of even more significant concern, such as antibiotics, personal care products, etc. The presence of these compounds in the water environment can have negative impacts on both human health and the environment, including endocrine disruption, cancer, and mutations in aquatic organisms.

This Special Issue aims to bring together the latest research on the identification, characterization, ecological effects and control of these emerging contaminants. We welcome contributions from researchers and practitioners in fields such as environmental chemistry, toxicology, engineering and environmental policy. This Special Issue is focused on the risk formation mechanisms and management strategies for emerging contaminants. Topics of interest include but are not limited to the following:

  1. Contaminant source analysis;
  2. Environmental behavior, such as storage, transport and transformation;
  3. Ecological effects and toxicology;
  4. Risk assessment;
  5. Control strategies.

We believe that this Special Issue will offer a valuable platform for sharing knowledge and experiences, promoting collaboration and identifying new research directions in the field of water environment pollution control. We invite you to join us in exploring this important topic.

Dr. Fanhao Song
Dr. Xiaodong Li
Dr. Qiuheng Zhu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • emerging contaminants
  • environmental behavior
  • ecotoxicology
  • ecological engineering
  • environmental remediation
  • treatment technologies
  • environmental microorganisms
  • natural processes
  • risk assessment

Published Papers (2 papers)

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Research

14 pages, 2956 KiB  
Article
Effect of Aeration and External Carbon Source on Nitrogen Removal and Distribution Patterns of Related-Microorganisms in Horizontal Subsurface Flow Constructed Wetlands
by Hao Zhang, Rongxin Li, Yue Shi and Fuxia Pan
Water 2024, 16(5), 632; https://doi.org/10.3390/w16050632 - 21 Feb 2024
Viewed by 711
Abstract
Nitrogen pollution of surface water is still a critical issue worldwide. In this study, a total of four treatments were conducted in horizontal subsurface flow constructed wetlands (HSSFCWs) to explore the removal rate of nitrogen in the carbon-deficient wastewater, including combination of aeration [...] Read more.
Nitrogen pollution of surface water is still a critical issue worldwide. In this study, a total of four treatments were conducted in horizontal subsurface flow constructed wetlands (HSSFCWs) to explore the removal rate of nitrogen in the carbon-deficient wastewater, including combination of aeration and external carbon source (CW_CA), external carbon source (CW_C), aeration (CW_A), and control group without aeration and carbon source (CW_CK). Results showed that the removal rates of total nitrogen (TN) in the enhanced treatments were increased compared with CW_CK. The highest removal rates of COD (66.56%), NH4+-N (73.51%), NO3−-N (79.31%), and TN (76.19%) were observed in the CW_CA treatment. The bacterial community structure at the fore and rear ends of HSSFCWs was simultaneously changed in the CW_CA and CW_C treatments, respectively. The highest richness index at both the fore and rear ends of HSSFCWs was found in the CW_CA treatment. The richness and diversity indices of CW_C declined at the fore ends of HSSFCWs, but increased at the rear ends of HSSFCWs. Furthermore, the functional bacteria and genes significantly changed among different treatments. At the fore ends of HSSFCWs, the highest relative abundance of nitrifiers and absolute abundance of amoA and nxrA were obtained in CW_A, and the highest relative abundance of denitrifying bacteria and absolute abundance of nirS, nirK, nosZ were found in CW_C. However, at the rear ends of HSSFCWs, the highest relative abundance of nitrifiers and denitrifying bacteria as well as the absolute abundance of related genes were also observed in the CW_CA treatment. Overall, CW_CA improved the nitrogen removal rate by increasing the abundance of nitrogen-converting functional microbes and the genes associated with nitrification and denitrification. Full article
(This article belongs to the Special Issue Emerging Contaminants in Natural and Engineered Water Environments: Environmental Behavior, Ecological Effects and Control Strategies)
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13 pages, 4316 KiB  
Article
Impacts of Acetochlor on Nitrogen-Cycling-Related Microbial Communities in Riparian Zone Soils
by Chunjian Lyu, Jianglong Cui, Fangyuan Jin, Xiaojie Li and Yaning Xu
Water 2024, 16(3), 461; https://doi.org/10.3390/w16030461 - 31 Jan 2024
Viewed by 674
Abstract
The riparian zone has a proven ability to reduce agricultural nonpoint-source nitrogen pollution. However, prior studies have only assessed nitrification and denitrification and their influencing factors, such as hydrology, climate, vegetation, and soil physicochemical properties, and overlooked the role of pesticide accumulation, which [...] Read more.
The riparian zone has a proven ability to reduce agricultural nonpoint-source nitrogen pollution. However, prior studies have only assessed nitrification and denitrification and their influencing factors, such as hydrology, climate, vegetation, and soil physicochemical properties, and overlooked the role of pesticide accumulation, which is an important nonpoint-source anthropogenic pollutant. This study investigated the response of the soil microbial nitrogen cycle in riparian zones to 60 days of acetochlor (ACE) exposure at doses of 0.5, 2.5, and 5.0 mg/kg. The results showed that ACE inhibited the transformation of soil NH3-N, NO3−-N, and NO2−-N and also decreased potential nitrification and denitrification rates by affecting the respective enzyme activities and related microbial communities. Metagenomic sequencing revealed that the expression of functional genes associated with NO3−-N transformation processes, including denitrification, dissimilatory nitrate reduction to ammonium, and assimilatory nitrate reduction, declined the most. The recommended field dose (0.5 mg/kg) showed a slight effect on soil microbial nitrogen transformation and the related microbial communities, whereas doses 5 and 10 times the recommended dose were highly inhibitory. This is a novel study exploring the effects of ACE on the microbial nitrogen cycle in riparian soils, also suggesting that pesticide accumulation in riparian zones could affect the health of aquatic ecosystems. Full article
(This article belongs to the Special Issue Emerging Contaminants in Natural and Engineered Water Environments: Environmental Behavior, Ecological Effects and Control Strategies)
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